Differential charge sensing circuit for mos devices

Details Differential charge sensing circuit for mos devices Differential charge sensing circuit for mos devices

G - Physics

11

C

352/82.24

G11C 11/40 (2006.01) G11C 19/28 (2006.01) H03H 15/02 (2006.01)

Patent

CA 1082363

DIFFERENTIAL CHARGE SENSING CIRCUIT FOR MOS DEVICES Abstract of the Disclosure A non-destructive sensing of mobile charge in charge transfer devices or other MOS devices is accomplished by the use of a circuit utilizing two operational amplifiers. One operational amplifier is employed as an inverting amplifier responsive to one input signal, and the other operational amplifier is employed as a summing amplifier responsive both to a second input signal and to the output signal from the first operational amplifier. The electrodes of the MOS device being sensed, as well as capacitors in the sensing circuit, are precharged to given voltage levels before the actual sensing occurs. - i -

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